EASILY GROWN ROCK PLANTS 97 
borne from the latter days of spring until early autumn. 
(ENOTHERA.—The Evening Primrose is the common name 
for a highly interesting family of plants that contains 
several particularly good rock plants as well as the familiar 
tall, free-flowering yellow biennial, which is itself one 
of the most useful and showy of hardy flowers. The whole 
family may be written down as perfectly simple in their 
cultural requirements, but the smaller, tufted and pros- 
trate growers, which are the best for collections of rock 
plants, need to be planted in groups clear of rambling 
plants that are prone to smother neighbours of less ram- 
pant growth. Some of the kinds are real “ evening” 
flowers, but others keep their blossoms open throughout 
the day. Of the latter group, @. fruticosa is an example, 
and it is a free-growing plant of tufted growth with erect 
stems carrying heads of rich yellow flowers. (CE. glauca 
fraseri is another of similar character, but dwarfer. Both 
may be increased by division. Remarkable in character, 
and extremely beautiful is CE. acaulis, frequently named 
taraxacifolia. One peculiarity is the remarkable resem- 
blance of its foliage to that of the dandelion, which 
resemblance has frequently led to the unwitting destruc- 
tion of young plants. Of prostrate habit, the plant produces 
large widely opening blossoms, 4 inches or more across, 
which open a pure satiny white. The second day the 
blossoms change to a delicate but clear shade of pink. 
and the effect of old and new blossoms intermixed is 
very fine. The plant grows readily and true from seed. 
An excellent companion for this plant is CE. missouriensis, 
which produces bright red, prostrate stems clothed with 
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